Usage Reports - How to explain active users

[Glen Steffens]

Can anyone provide an explanation of the Office 365 Admin ODfB Report that shows Total vs. Active Users? What activities does a user have to do to make them "active"? If they have the sync client installed, configured and syncing would that not make them active? Our tenant report shows a big difference between those we have enabled and those that are active so management is questioning what this means.

[#2]

Got the answer back in Yammer but basically it is any user that has accessed, modified, or shared a file during the reporting period. The reports do not show the total number of users who are only syncing and not actively modifying or accessing files.